Schmidt Paulsen, Uwe

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Downloaded from orbit.dtu.dk on: Dec 17, 2017The 5 MW Deepwind Floating Offshore Vertical Wind Turbine Concept Design - StatusAnd PerspectiveSchmidt Paulsen, UwePublication date:2014Link back to DTU OrbitCitation (APA):Schmidt Paulsen, U. (2014). The 5 MW Deepwind Floating Offshore Vertical Wind Turbine Concept Design -Status And Perspective European Wind Energy Association (EWEA). [Sound/Visual production (digital)].European Wind Energy Conference & Exhibition 2014, Barcelona, Spain, 10/03/2014The 5 MW Deepwind Floating Offshore Vertical Wind Turbine Concept Design - Status And Perspective Uwe Schmidt Paulsen uwpa@dtu.dk DTU Wind Energy, Technical University of Denmark           Contents • What is DeepWind – Motivation and Background – Concept • Design Status – Design tools  – Rotor – Floater – Generator and Bearing technology – Controls • Conclusion     2 25 March 2014 DTU Wind Energy, Technical University of Denmark           DeepWind • A radical new design- aiming for better COE and a more reliable wind turbine  – Few components-less failures at less cost – Pultrusion-less failures; cost approximately 30% of conventional blade – Operation not influenced by wind direction – New airfoil profiles  available for better efficiency – Simple stall control with overspeed protection • Rotating spar with high Aspect ratio-Less displacement than existing concepts • No nacelle-low center of gravity - high stability • Upscaling potential • Insensitive to wind turbulence 3 25 March 2014 Vita L, Paulsen US, Pedersen TF, Madsen HA, Rasmussen F A Novel Floating Offshore Windturbine Concept  in Proceedings of the European Wind Energy Conference (EWEC), Marseille, France,2009 Vita L, Zhale F, Paulsen US Pedersen TF, Madsen HA, Rasmussen F. Novel Concept For Floating Offshore Wind Turbines: Concept Description And Investigation Of Lift, Drag And Friction Acting On The Rotating Foundation  in Proceedings of the ASME 2010 29th International Conference on Ocean, Offshore and Arctic Engineering, June 6 Shanghai 2010 OMAE2010-20357 Vita L Offshore floating vertical axis wind turbines with rotating platform Risø DTU, Roskilde, Denmark, PhD dissertation PhD 80, 2011 Larsen  TJ, Madsen HA. On The Way To Reliable Aero-elastic Load Simulation On VAWT’s. Proceedings of EWEA 2013 Wind Energy conference Vienna;2013 DTU Wind Energy, Technical University of Denmark           Design suites(1)  General FE model  Wind Atmospheric Turbulence Shear  Aerodynamics Dynamic stall Actuator Cylinder  Hydrodynamics Magnus force Morrison forces  Friction  Mooring lines  Generator control  4 25 March 2014 DTU Wind Energy, Technical University of Denmark           Design suites(2) • Generator design tool • CAD design tool     Optimization Simulation Visualization 5 25 March 2014 DTU Wind Energy, Technical University of Denmark           Bearing design-test rig 6 25 March 2014 DTU Wind Energy, Technical University of Denmark           Preconditions-Site(Karmøy, No) 7 25 March 2014 Velocity of the water currents at the surface [m/s] 0, [0.35,0.7] Maximum significant wave height Hs [m] 14 Maximum peak wave period TP [s] 16 Wind speed (limit wind speed of the design) [m/s] <25 Latitude: 59° 8'44.88"N,  Longitude: 5° 1'25.66"E DHI’s Hindcast model DTU Wind Energy, Technical University of Denmark           Sketch of the concept 8 25 March 2014 MSLzyzyzy zyzyTower top Blade i,7Blade i,6Blade i,5Blade i,4Blade i,3Blade i,2Blade i,1Tower bottomBearingArm i HeaveSurgeSwayRollYawTilt• Modified rotor shape  |ε|<5000E-6 m/m  Sectionized NACA 0018,0025 profiles  Light rotor with pultruded blades • Simple conical support tower  • Floater design implemented • Generator at end of rotating spar DTU Wind Energy, Technical University of Denmark           Airfoil development 9 25 March 2014 LTT WT TUDelft DTU Wind Energy, Technical University of Denmark           Blade Design 1st DeepWind 5 MW baseline design 10 25/03/2014 Pultrusion:  Constant chord over length Low manufacturing cost + Structural strength for thin profiles  -    .:. Structural stiffeners  to improve  strength in blade cross  section  5 MW blade section,  1st baseline Rotor shape:  Gravity and centrifugal loads are important for VAWT rotor blade shape design Present design fully shape optimized   DTU Wind Energy, Technical University of Denmark           Blade shape optimization 11 25 March 2014 Loading: Sea state 3, 24 m/s no turbulence “Pultrusion is one of the most cost-efficient composite manufacturing methods to produce constant cross sectional profiles at any length”.  DeepWind-from idea to 5 MW concept Energy Procedia (2014)   DTU Wind Energy, Technical University of Denmark           Pultrusion manufacturing 12 25 March 2014 100 mm  Baran I, Tutum CC, Hattel JH. The internal stress evaluation of the pultruded blades for a Darrieus wind turbine. Key Eng. Mat. 2013; 554-557: 2127-2137 DTU Wind Energy, Technical University of Denmark           Industrial joints solution 13 25 March 2014 Courtesy of SSP Technology A/S © Slim profile-------Joint------Thick profile r1 r2  Investigation of potential extreme load reduction for a two-bladed upwind turbine with partial pitch,” Taeseong Kim, Torben J Larsen, and Anders Yde, Wind Energy, submitted 2013. DTU Wind Energy, Technical University of Denmark           Floater 14 25 March 2014 • Gravity stability: vertical distance between COG and BC • If Rotation around COG and weak Pitch-Surge coupling :    .:. Tn5=2Pi √(I55+a55/k55)  • Avoid resonance  Tn> wave periods with significant energy contents  (I55 + a55) increase or decreasing k55  CB COG DTU Wind Energy, Technical University of Denmark           Floater 15 25 March 2014 Natural Period [s] Static heel(tilt)  Angle [˚] COG [m] 90 60 16 11 29 31 Pitch tilt DTU Wind Energy, Technical University of Denmark           Safety system 16 25 March 2014 Demonstrator testing blades hitting water   Wave Before  hit  after DTU Wind Energy, Technical University of Denmark           Safety system 17 25 March 2014 Idea from Demonstrator testing blades hitting water   Huge Rotor Inertia Slow rpm 0.6 rad/s  Max sinking depth to avoid mooring line twisting is 65 m  ≈ 50 deg twist .:. To be verified 36 m DTU Wind Energy, Technical University of Denmark           Results Blade shape-modified Troposkien shape 18 25 March 2014 • Blade length ≈200 m • Blade weight ≈ 45 T • Less bending moments at blade root and predominantly tension DTU Wind Energy, Technical University of Denmark           Results-Electrical system 19 25 March 2014 Direct Drive Permanent Magnet Radial Flux Height x Dia ≈3m x 6m Weight (core material) ≈ 90 T  DTU Wind Energy, Technical University of Denmark           Results-Electrical system 20 25 March 2014 2p damping with notch  filter and PI controller All active turbine control via generator torque Grid integration  4 quadrant inverter  DTU Wind Energy, Technical University of Denmark           Results-power curve 21 25 March 2014 DTU Wind Energy, Technical University of Denmark           Results-pitch 22 25 March 2014 DTU Wind Energy, Technical University of Denmark           Results-roll 23 25 March 2014 DTU Wind Energy, Technical University of Denmark           Results-moments 24 25 March 2014 DTU Wind Energy, Technical University of Denmark           Conclusions 25 25 March 2014 • Demonstration of a optimized rotor design with pultruded, sectionized GRP blades • Aerodynamic stall control, a robust and simple electrical controls • 2 Blades with 2/3 less weight than 1st baseline 5MW design, and Less bending moments in root, and tension during operation • Potential for less costly light weight rotor • Use of moderate thick airfoils of laminar flow family with smaller CD0 and good CP  increase efficiency  and increase structural rigidity • Floater :successful design in harsh environment • Industrial solutions  available for joints, underwater generator  and mooring system • No show stopper- the concept can be developed further in an industrial optimization process • COE/LCOE: DeepWind technology in a steep learning curve  • The 20 MW is far beyond current wind turbine sizes   DTU Wind Energy, Technical University of Denmark           Acknowledgement 26 25 March 2014 The work is a result of the contributions within the DeepWind project which is supported by the European Commission, Grant 256769 FP7 Energy 2010- Future emerging technologies, and by the DeepWind beneficiaries:  DTU(DK), AAU(DK), TUDELFT(NL), TUTRENTO(I), DHI(DK), SINTEF(N), MARINTEK(N), MARIN(NL), NREL(USA), STATOIL(N), VESTAS(DK) and NENUPHAR(F). This project has received funding from the European Union’s Seventh Programme for research, technological development and demonstration under grant agreement No 256769 Thank You for Attention DTU Wind Energy, Technical University of Denmark           27 25 March 2014 

The 5 MW Deepwind Floating Offshore Vertical Wind Turbine Concept Design - Status And Perspective

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The 5 MW Deepwind Floating Offshore Vertical Wind Turbine Concept Design - Status And Perspective

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